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Posted to issues@kudu.apache.org by "Andrew Wong (Jira)" <ji...@apache.org> on 2020/10/11 18:42:00 UTC

[jira] [Resolved] (KUDU-3071) Expose splitKeyRanges in the C++ clients

     [ https://issues.apache.org/jira/browse/KUDU-3071?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrew Wong resolved KUDU-3071.
-------------------------------
    Fix Version/s: n/a
       Resolution: Won't Fix

Impala can actually leverage the split key ranges feature already because it would (and does, following IMPALA-9792) generate tokens from its frontend.

> Expose splitKeyRanges in the C++ clients
> ----------------------------------------
>
>                 Key: KUDU-3071
>                 URL: https://issues.apache.org/jira/browse/KUDU-3071
>             Project: Kudu
>          Issue Type: Improvement
>          Components: client, perf
>            Reporter: Andrew Wong
>            Priority: Major
>             Fix For: n/a
>
>
> KUDU-2437 introduced the server-side ability to return "split keys" that logically divide a given tablet into key ranges. KUDU-2670 introduced an improvement in the Spark integration's KuduRDD to allow for Spark to use this generate smaller-scoped scan tokens that each scan a chunk of a tablet instead of entire tablets. This decoupled the a table's partitioning scheme from its read concurrency limitations.
> It'd be great if we could expose chunked-token-hydration in the C++ client so that Impala can begin generating these chunked tokens and then hydrating them into smaller scanners in its backend.



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